1 December 2009 - national renumbering

New subscriber numbers and various service codes took effect 1 December 2009.
Fixed/wireline subscriber numbers generally remained at 7-digit length.
Permissive use of both old and new formats took effect until 1 January 2010,
except for the Eastern Highlands region.

1995 - 6 to 7 digit national numbers

Papua New Guinea had 6-digit subscriber numbering (without area codes)
prior to 1995.

Effective February 1995, 7-digit numbers beginning with 32 and 64 were
activated to change 6-digit numbers beginning with 2 and 6 respectively.

Permissive dialling of both formats continued until August 1995, after
which recorded message alerts on old format numbers were in effect until
November 1995. Presumably the last 5 digits of these numbers were unchanged.